I've looked around, and found answers that told me that this is most likely because my default assignee does not have the assignable permission (gee, thanks.) The problem is, the default assignee for my project DOES have the assignable permission. It's set via a project role, which the default assignee (also the project lead) is a member of. We do NOT want to allow issues to be created unassigned. Where else can I look for what might be causing this issue?